Combined switch and fuse



April 7, 1925.

w. G. DEXTER COMBINED SWITCH AND FUSE iled March 8, 192g 40 closed circuit.

Patented Apr. 7, 1925.

1,532,233 tease-1amossiies..

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"coiirsmfen KSWITQH: 41in QFUSE.

" Application filed March 8, 192% Serialllt. 541,899. I

To all who'nt mayconcern:

Be it known that Henson-G. Dsx'rnn, a'citizei'rofthe'Un-ited States; a resident ot "Brook yn; in thecounty of.- Kings'and State ''of New 'York', llELVQllH-QIECG-Cl a certain new and useful Combined Switch andFuse, of which the following is a specification.

This invention' has as an object zthe construction 'of a combined switch and fusewhiclrwill: involve less space," wiring and general cost-of insulation than-ethe usual forms of switches and'coniicctedifuses. @It

has asanot'liefobjeci'theavoidance of. the separation of the fuse 'fromi the switch such as is the'case'when the fuse is mountedhat the back'of the SW'ltClPbOiil'tlu Itihas-as a further object the 'provisi'on of means for easily removing the P fuse while: the c'i r'cuit- I is broken and inserting? another I fuse; i and -a1s0- the provision of means-toprevent the re 'm'oval of the fusewh'enthe circuit is vclosed.

Further objects will appear zfromi the following'desci-iption. v i

' 1 These objects are accomplished tin the -present invention of' which :the-ifol-lowin'g -'description constitutes 'a' preferred fiembedit-ment, reference being made: tot-he'thFaW- ings which form part of the-specification. In said drawings,

"iivF'igure 1 represents a'plan view oftthe combined switch and fuse-.;for i ise in'a'-;complete "circuit; I i

Fig. 2 shows a side view thereof, and

Fig. 3 shows the movable contact member 5 in elevated position with the fuse disengaged from one of its holding members.

In this embodiment of the invention there is shown a combined knife switch and car tridge fuse designed to operate in a single The fixed contact members 1, 2 and 3, 4: of the knife switch are mounted on a base block 5 and a movable contact member denoted generally by (l is pivoted at 7, 8 to the members 3, 4:. This movable memher is made up of a non-conducting cross or connecting piece 9 in which the pivoted conducting bars 10, 11 are fixed, and to this piece 9 is fixed a central rod 12 having pivoted thereto another rod 13 by means of a pivot at l t. A plunger 15 is fixed to the end of rod 13.

Mounted upon the structure first described and relatively movable with respect thereto, is another structure comprising a handle 16 attached to across-bar 17 of non-conduct ing character, which receives the ends of conducting knives, 18, 19 ofqthe-knifeswitch. The latter are connected to holdingisme'mbers 20, 21 provided with spring fingers to engage f;riss;22,;23. 't'l he -.oth.erends of said =fuses are received inirigidholdingsmembers 24, 25 ,whicln are preferably; not yieldable, A. spring-:26 is inserted between-the'fplunger;"15. and d3 stop 27 on-. t-he;handle 16 so that when .theyxmove: relatively to each other-the sprin iilhhaveaitendency;;to f0rce them back .to their original"positions. Y

1 In; thei operation. ofpthis device: it will be uapparenti that-i when the. switch: is closed?) as isholwn in Rigs: 1 and 2, theicurrentlwill run in one di-rectionathrougln:fixed:contacts-members 1-, andi the fuse 22a .1 and I returned in the other alirection-zthrough members 1 2, 4; and theJ-fuSe-23E *Hlfil'lt the-circuit isebroken hy lifting the imovable .-..'cbntact ni ember-,- t it "will be possible-tonpullz-theuhandle 16;;out i away fromhmembersaS, 1. against; the ,res-ist- 'ance of the springn26; to a; point where the ihandle with its Fattached: parts maybe swung or; tilted aboutggpi vot 14: assho'wn; in-EigJB, thus enabling'ithe; operator to giremove i the otuse -22 Whic -f ih e me aine byctl ,spring fingers 0f the holding 1 z nembein 20. 5111. thi pd itio i t es pri g; 2 i1 o rs not be able to force the handlmback; t 0- i. s -,o1"iginal position,- b'uty vwhe n the handle is onceflmo're 911121.;IllPU1E111Qd 1 to -,br i-ng the {parts into alinemen't the spring wilhforce -tlie f ise back into the holding member 24: so that the movable contact member will again present a rigid structure. It will be evident that in this latter position the fuse cannot be removed by pulling it out, and when the movable cont-act member is brought down into contact with the fixed contact members the fuses cannot be removed at all since the handle 16 cannot be pulled out in the position shown in Figs. 1 and 2.

There are many advantages in the above described preferred embodiment, for no extra wiring is required; there is but little labor involved in installation; space is economized, and it becomes unnecessary for the operator to go to the back of the switchboard or elsewhere in order to determine the condition of the fuse or to remove it. Furthermore, in order to remove the fuse it is necessary to break the circuit, after which the removal of the old fuse and the insertion of the new one becomes an easy matter. The operation of breaking the circuit and pulling out the handle 16 may be conducted in a single movementof the hand and arm of the operator, thus making the matter of attention and inspection of fuses. a very simple and expeditious afiair. i

As many apparently widely different embodiments of this invention maybe made without departing from the spirit thereof, it is to be understood that I do not intend to limit myself to the specific embodiment thereof except as indicated in the appended claims.

I claim: e

1. An electric switch comprising fixed contact members, a movable contact'mcmber associated therewith having portions respectively contacting with said fixed contact members, conducting clips interposed between said contacting portions of said movable contact member, means permitting relalive. movement between said conducting clips without disconnecting said movable contact member, and fuses held-inposition by said clips and disengageable iherefromby relative movement therebetween.

2. An electric knife switch.-:c'omprising.- fixed contact members,.-a movable. contactmember pivoted to oneof thefixcd itemhers, said movable-contact -member hein'g made up ofia non-iconductingrod in fixed relation with the pivot, a'secondrod a pivoted to the first mentioned 'rodn'n order? to. permit a tilting movemen t, a fixed fuse holder affixed to said non-condueti.ng:rod, means'on' said second rod carrylng a fuse holder,:sa1d r latter means being movable with respect "to 'the fixed fuse holder to disengage thefuse and to permit al tilt ng -movement"of saidsecond rod. l .7 i

8. An electric knife switch-comprising fixed contact members, 'a 'movabley'cm'xtact member pivoted to one of the fixca memhere, said movable contacts member being made up of a non-conducting rod in fixed relation with the pivot, a second rod pivoted to the first mentii'ined rod in order to permit a tilting movement, a handle mounted around said rods so that it may be moved along them to clear the pivot and permit a tilting movement, a movable fu5 holder attached to the handle and a IXEd fuse holder attached to the first mentioned nonconducting rod.

4. An electric switch comprising fixed contact members, a movable contact member associated therewith having portions fies pee a 'tilting movement, a handle mountedaround sald rods so thatit may br- :moved along th'emto clear the pivot and permit a tilting movement, a movable fuse Mar attached to the handle, a fixed fuse hclcleir attached-t0 the first mentioned non-conducting rod; and aspring inside the handle arranged to force the said secondrad back into position.

In testimony that I claim thefere 'oing,

l-have hereunto set my hand this an day i of February, 1922, 5- V WALLACE G. DEX, .llR. 

